18073-3517 BRT1756AC

Coord 2000	18073-3517		Discov num	BRT1756		Comp	AC		Coord arcsec 2000	18 07 15.99 -35 17 05.7
Date first	1912		Date last	2015		Obs	7
Pa first	157		Pa last	162		P.A. Now (θ)	162°
Sep first	9.4		Sep last	9.1		Sep. Now (ρ)	9.1"
Mag pri	10.62		Mag sec	13.40		delta mag (ΔM)	2.78		Spectral class	B9 (blue-white)
Pri motion ra	+003		Sec motion ra
Pri motion dec	-006		Sec motion dec
Notes

Nature of this double is uncertain.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			18073-3517	BRT1756	AB	1912	2015	9	94	7.1	10.62	12.40	1.78
Show			18073-3517	BRT1756	AC	1912	2015	7	162	9.1	10.62	13.40	2.78		<===

Triple system
3 visible stars in this system

Precise pa	161.9		Precise sep	9.144		Constellation	Sagittarius		Tycho2	7399-00841-1
Gaia DR2	75251290112		HD	321287

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
18073-3517	BRT1756	AC	1913	2	275	7.6	10.62	13.40	B9		180715.99-351705.7
18073-3517	BRT1756	AC	2000	3	162	9.2	10.62	13.40	B9		180715.99-351705.7
18073-3517	BRT1756	AC	2015	8	162	9.1	10.62	13.40	B9		180715.99-351705.7

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